"In response to several inquiries regarding the Syria statement issued last night, we want to clarify that all relevant agencies-including State, DoD [Department of Defense], CIA and ODNI [Office of the Director of National Intelligence] — were involved in the process from the beginning," the official stated as quoted by the pool.
Some media reports indicated the White House announcement was not coordinated with relevant agencies, and moreover, the US-led coalition fighting Daesh and the Defense Department were not informed about the upcoming release and the intelligence the announcement was based on.
Damascus has repeatedly denied any involvement in the incident and said that the Syrian government doesn't possess chemical weapons as the full destruction of Damascus’ chemical weapons stockpile had been confirmed by the Organization for the Prohibition of Chemical Weapons (OPCW) in January 2016.
In an interview with Sputnik on April 21, Assad characterized the alleged chemical attack in Khan Sheikhoun as a provocation to justify the US strike on Ash Sha’irat. The Syrian leader also warned of the possibility of the new provocations similar to the one in Khan Sheikhoun.